<template>
 <view class="content">
    <Navbar></Navbar>
      <!-- 
      1 开启下拉刷新 refresher-enabled
      2 下拉事件 refresherrefresh
      3 滚动条触底事件 scrolltolower
      4 运行上下滚动  scroll-y
      5 refresher-triggered 控制 下拉状态 显示和隐藏
      
     -->
    <scroll-view 
    scroll-y 
    class="main"
     @scrolltolower="scrolltolower"
     refresher-enabled
     @refresherrefresh="refresherrefresh"
      :refresher-triggered="refresherTriggered"
     >
      <!-- 2 轮播图 -->
      <Carousel :banners="banners" height="280rpx"></Carousel>
      <!-- 3 前台类目 -->
      <CateScroll :categoryHeadMutli="categorymutli"></CateScroll>
      <!-- 4 人气推荐 -->
      <view class="panel recommend">
        <view class="item" v-for="item in hotMutli" :key="item.id">
          <view class="title">
            {{ item.title }}<text>{{ item.alt }}</text>
          </view>
          <navigator
            hover-class="none"
            :url="`/pages/recommend/index?type=${item.type}`"
            class="cards"
          >
            <image
              mode="aspectFit"
              v-for="img in item.pictures"
              :key="img"
              :src="img"
            ></image>
          </navigator>
        </view>
      </view>
        <!-- 5 新鲜好物 -->
        <view class="panel fresh">
        <view class="title">
          新鲜好物
          <navigator
            hover-class="none"
            class="more"
            url="/pages/recommend/index?type=5"
            >更多</navigator
          >
        </view>
        <view class="cards">
          <navigator
            hover-class="none"
            :url="`/pages/goods/index?id=${item.id}`"
            v-for="item in homeNew"
            :key="item.id"
          >
            <image mode="aspectFit" :src="item.picture"></image>
            <view class="name">{{ item.name }}</view>
            <view class="price">
              <text class="small">¥</text>{{ item.price }}
            </view>
          </navigator>
        </view>
      </view>
      <!-- 6 热门品牌 写死静态 没有接口 -->
      <view class="panel brands">
        <view class="title">
          热门品牌
          <navigator hover-class="none" class="more" url="/pages/list/index"
            >更多</navigator
          >
        </view>
        <view class="cards">
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_1.jpg"
            ></image>
            <view class="name">小米</view>
            <view class="price">99元起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_2.jpg"
            ></image>
            <view class="name">TCL</view>
            <view class="price">199起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_3.jpg"
            ></image>
            <view class="name">饭小宝</view>
            <view class="price">9.9起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_4.jpg"
            ></image>
            <view class="name">鳄鱼</view>
            <view class="price">299起</view>
          </navigator>
        </view>
        </view>
        <!-- 7 猜你喜欢 -->
        <Guess :homeGoodsGuessLike="goodsGuessLike"></Guess>
    </scroll-view>
  </view>
</template>

<script>
import {mapState,mapMutations} from 'vuex'
import  http  from "@/utils/http";
// 引入发送请求函数
import { getHomeBanner ,
    getHomeCategoryMutli,
    getHomeHotMutli,
    getHomeNew,
    getHomeGoodsGuessLike 
} from "@/api/home";
// 导入组件
import Navbar from './components/Navbar.vue';
export default {
    components:{Navbar},
    computed:{
       
    },
    data(){
        return{
            // 轮播图数据
            banners:[],
            // 前台分类
            categorymutli:[],
            // 热门推荐
            hotMutli:[],
            // 新鲜好物
            homeNew:[],
              // 猜你喜欢
      goodsGuessLike: [],
            // // 控制scroll-view 开启和关闭下拉状态
      refresherTriggered: false,
        }
    },
    onLoad() {
      this.getHomeBanner()
      this.getHomeCategoryMutli()
      this.getHomeHotMutli()
      this.getHomeNew()
    //   总页数
      this.GuessPages =1
       // 因为后期做分页加载，反复调用这个接口 ， 传递参数 page =1 ,page=2
    // 将接口参数设置为全局变量 仅仅是方便我在js中充当一个全局变量， 和 页面渲染，不能直接获取 GuessPrams 来渲染 无效
    this.GuessParams = {
      page: 1,
      pageSize: 10,
    };
    // 添加一个猜你喜欢的节流阀
    this.isLoadding =false
      this.getHomeGoodsGuessLike ()
     
    },
    methods:{
         // 首页-广告区域-小程序
      async getHomeBanner(){
        const res= await getHomeBanner()
        this.banners=res.result
      },
       // 首页-前台分类-小程序
      async getHomeCategoryMutli(){
        const res =await getHomeCategoryMutli()
        this.categorymutli = res.result
      },
        // 首页-热门推荐-小程序
        async getHomeHotMutli(){
        const res =await getHomeHotMutli()
        this.hotMutli = res.result
       
      },
        // 首页-新鲜好物-小程序
        async getHomeNew(){
        const res =await getHomeNew()
        this.homeNew = res.result
       
      },
       // 猜你喜欢-小程序
    async getHomeGoodsGuessLike() {
      const res = await getHomeGoodsGuessLike(this.GuessParams);
      console.log(res);
      this.goodsGuessLike = [...this.goodsGuessLike,...res.result.items];
      this.GuessPages = res.result.pages
    },
    // scroll-view 滚动到底部触发 分页加载
    async scrolltolower(){
        if (!this.isLoadding&&this.GuessParams.page<this.GuessPages) {
          this.isLoadding=true
        //   下一页数据
          this.GuessParams.page++
          await this.getHomeGoodsGuessLike()//异步代码
        
          this.isLoadding =false  
        }
    },
     // scroll-view  下拉刷新事件
     async refresherrefresh(){
        this.refresherTriggered = true; // 开启下拉状态
          /* 
     1 清空旧的数据
       1 data中的数据
       2 一些全局变量 -分页 页码
     2 获取新的数据 
      */
      // //  清空
      this.banners = [];
      this.categorymutli = [];
      this.hotMutli = [];
      this.homeNew = [];
      this.goodsGuessLike = [];
      // == 一些全局变量 -分页 页码
      this.GuessParams.page = 1;
      this.GuessPages = 1;
      this.isLoadding = false;
      await Promise.all([
        this.getHomeBanner(),
        this.getHomeCategoryMutli(),
        this.getHomeHotMutli(),
        this.getHomeNew(),
        this.getHomeGoodsGuessLike(),
      ]);
         // 模拟 数据都请求回来
         this.refresherTriggered = false;

     }
    },
   
};
</script>

<style lang="scss" scoped>
.content {
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.main {
  flex: 1;
  overflow: hidden;
  background-color: #f7f7f8;
}
/* 公共面板 */
.panel {
  margin: 20rpx 20rpx 0;
  border-radius: 10rpx;
  background-color: #fff;
  .title {
    display: flex;
    align-items: center;
    padding: 24rpx 24rpx 0;
    font-size: 32rpx;
    color: #262626;
    position: relative;
    text {
      font-size: 24rpx;
      color: #7f7f7f;
      margin-left: 18rpx;
    }
  }
  .more {
    position: absolute;
    right: 24rpx;
    font-size: 26rpx;
    color: #7f7f7f;
  }
  .cards {
    display: flex;
  }
  .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}
/* 推荐专区 */
.recommend {
  display: flex;
  flex-wrap: wrap;
  .item {
    display: flex;
    flex-direction: column;
    width: 50%;
    height: 254rpx;
    border-right: 1rpx solid #eee;
    border-top: 1rpx solid #eee;
    &:nth-child(2n) {
      border-right: 0 none;
    }
    &:nth-child(-n + 2) {
      border-top: 0 none;
    }
  }
  .cards {
    flex: 1;
    padding: 15rpx 20rpx;
    justify-content: space-between;
    image {
      width: 48%;
    }
  }
}

/* 新鲜好物 */
.fresh {
  min-height: 320rpx;
  .price {
    line-height: 1;
    text-align: left;
    font-size: 26rpx;
    color: #cf4444;
  }
  .small {
    font-size: 80%;
  }
}
.fresh .cards navigator,
.brands .cards navigator {
  width: 25%;
  padding: 15rpx 20rpx 20rpx;
  line-height: 1;
  text-align: center;
}
.fresh image,
.brands image {
  width: 126rpx;
  height: 126rpx;
}
.fresh .name,
.brands .name {
  margin: 20rpx 0 16rpx;
  font-size: 24rpx;
  color: #262626;
}
.brands {
  .price {
    font-size: 24rpx;
    color: #999;
  }
}
</style>
